| Value | Category | Cases | |
|---|---|---|---|
| -9 | Don't know (spontaneous) | 1 |
0.7%
|
| 1 | One month or less | 40 |
27%
|
| 2 | 13 |
8.8%
|
|
| 3 | 22 |
14.9%
|
|
| 4 | 5 |
3.4%
|
|
| 5 | 3 |
2%
|
|
| 6 | 22 |
14.9%
|
|
| 7 | 7 |
4.7%
|
|
| 8 | 13 |
8.8%
|
|
| 9 | 2 |
1.4%
|
|
| 10 | 6 |
4.1%
|
|
| 11 | 2 |
1.4%
|
|
| 12 | 12 |
8.1%
|
|
| Sysmiss | 467 |